A long straight wire of radius a carries a steady current I. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B' , at radial distances a/2 and 2a respectively from the axis of the wire is:

Question:

A long straight wire of radius a carries a steady current I. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B’ , at radial distances a/2 and 2a respectively from the axis of the wire is:

Options :

(a) 1/4
(b) 1/2
(c) 1
(d) 4

Answer :

Answer Steps :

step 1:

step 2:

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Related Questions

The kinetic energy of a particle executing a linear SHM is 16 J, when it is in the mean position. If the amplitude is 25 cm, periodic time of the particle in second is (Mass of the particle = 51.2 g)

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